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Coffee with Caleffi™: Protecting Boilers Against Flue Gas Condensation

coffee with caleffi 10.18

For decades, conventional boilers operating on natural gas, propane, fuel oil or wood were intended to be operated at conditions that prevent the flue gases produced during combustion from condensing within the boiler or the venting system. However, many of these boilers are now being combined with low temperature distribution systems such as radiant floor heating. Without proper detailing and controls this can subject the boilers to operating conditions that result in rapid corrosion and scaling. John Siegenthaler, P.E. joins the series to discuss why this dangerous condition occurs and will show several methods for avoiding it at the next Coffee with Caleffi™ webinar on Thursday, Oct. 18 at 12 noon CDT.

A seasoned industry leader, passionate teacher and a favorite guest speaker to the series, John shares his over 35 years’ experience in the understanding and proper application of water-based engineering principles. He is the principal of Appropriate Designs and a regular contributor to industry publications Plumbing and Mechanical, PM Engineer and HPAC magazines.

The one-hour educational webinars are free and are intended for contractors, designers and wholesalers. A Certificate of Attendance is emailed to attendees following the event for continuing education audits. Please visit our website at for schedule details and registration.


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